spotted Joe-Pye weed

Eutrochium maculatum, the spotted Joe Pye weed, is a North American species of flowering plant in the family Asteraceae. It is widespread through much of the United States and Canada. It is the only species of the genus Eutrochium found west of the Great Plains.

This herbaceous perennial sometimes grows as high as 2 m (6 ft 7 in). Stems are sometimes completely purple, sometimes green with purple spots. One plant can produce numerous rose-purple flower heads in late summer, each head with 8–22 disc flowers but no ray flowers. The specific name maculatum, meaning spotted, refers to the purple spots on the stem.